Thrust-bearing.



B. spLAwson.

THRUST BEARING. APPLICATION FILED NOV.15 ,1910.

1,084,582. Patented Jan. 13, 1914.

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Patented Jan. 13, 1914.

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B. S. LAWSON.

THRUST BEARING.

APPLICATION FILED NOV. 15, 1910.

W1 TNESSE-S Zfa 5 J UNITED STATES PATENT OFFICE.

BENJAMIN S. LAWSON, OI SYRACUSE, NEW YORK, ASSIGNOR TO ASA L. MERRICK, OF SYRACUSE, NEW YORK.

THRUST-BE ARING.

Patented Jan. 13, 1914.

Original application filed-March 10. 1910. Serial Nb. 548,346. Divided and this application filed November 15, 1910. Serial No. 592,592.

To all whom it may concern:

Be it known that-I, BENJAMIN .S. LAW- 'SON, a citizen of the United States, and

resident of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvement-s in Thrust-Bearings. of which the following, taken in connection with the accompanying drawings, is.a,full,clear, and exactdescrip- .axles, and relates to the style of axle-bearings embodying a box or casing having its interior formed annular to serve,as the outer bearing surface for an annular series of rollers encompassing the axle disposed concentric with the roller-bearing surfaces, the

said axle-box being formed on its outer end with a so-called bonnet.

The present invention is particularly re lated to the roller-bearing shown and described in my application Serial No. 548,346, filed March 10, 1910 Patent No. 999,570,

August 1, 1911), of which this case is a division.

The main object of the present invention is to provide an axle-box andaxle with simple and efi'ectual means which will resist all end-thrust and at the same time, may be combined with an axle of standard length.

To that end the invention consists in the novel arrangement and combination of the component parts of the roller-bearing which will be hereinafter fully described and set forth in the claim.

In the accompanying drawings Figure 1 is a longitudinal sectional view of the rollerbearing embodying my improvements; Fig. 2 is a transverse section on the dotted line XX- in Fig. 1; Fig. 3 is alongitudinal section on the line YY'. in Fig. 1;

Fig. 4 is a detail inner face view of the yoke which straddles the end portion of the axle; and Fig.- 5 is a detail face View of the plate which keys the yoke to the bonnet. Like numerals of reference indicate like parts in the several views of the drawings.

1 denotes the box or casing which 'is of the general type used in roller-bearings of car-axles.

2 denotes the usual so-called bonnet provided on the outer end of the axle-box and is generally of rectangular shape. In the present instance this bonnet is formed integral with the box and it is provided at its top with an opening 3 extending the full width thereof to afiord access to the interior, said opening being provided with interior thereof isof annular shape.

I For-a portion of the length of the box, midway between the ends" thereof, the interior is-formed with a cylindrical rollerbearing surface .8 which is concentric with-the axle, and at the sides of the cylindrical bearing-surface the interior is gradually reduced circumferentially tov provide two co-actingoppositely tapered roller-bearing surfaces 9-9- terminating at the end-walls of said box all-of which surfaces are case-hardened. Y

10 denotes a plain bearing-sleeve which embraces the axle within the box and has its inner end abutting against a 'circum-, ferential shoulder --11 formed on the axle and disposed adjacent to the corresponding end of the box, the opposite end of which sleeve is disposed flush with the inner side edge of the aforesaid groove 6. in the axle. This sleeve consists preferably of a cold drawn steel-tube which may be of any desired gage.

Between the box and bearing sleeve is disposed aseries of rollers 12-, -12 which are formed hollow and preferably composed of cold drawn steel tubing. For a portion of its length, midway between the ends thereof each roller is of plain cylindrical shape to conform to the bearing surface -8 o n the interior of the box -1, the end portions of the roller being tapered correspondingly,

with the co-acting bearing-surfaces '-99. The tapering of the rollers is preferably producedv by contracting the end portions. By thus tapering the rollers,'they are atforded a comparatively short bearing-surface on the sleeve 10- midway between the ends of the sleeve whereby the friction between the parts is reduced to a greater deioo gree, and the corresponding taper of the bearing-surface 9-9: effectually guards against the liability of the rollers to tilt, and thusproper working positions 'of the parts are insured. The said hollow rollers are designed to contain wasteor other material capable of absorbing lubricating oil, and at the center of the cylindrical portion of each roller is pro'vided'a small aperture l2 for the exit of the oil whereby the latter is distributed over the bearing-sur-.

faces.

.On the inner sides of the end walls of the box 1- are formed, annular bosses 13.-13- which are concentric with the axle and are provided with vertical faces which are in close proximity to the ends of the rollers. These faces are designed to, re-

ceive theend-thrust of ithe rollers and they are of such widthand sodisposed as to bear on small portions of the end faces of. the

rollers ad acent to the sleeve.

-14 denotes a yoke which is disposed within the bonnet -2f and straddles the end portion of the axle. This yoke is shaped to conform to the circumferential groove 6- and collar 7- of the axle and it is formed with an external groove -15 which is disposed in front of the collar.

To look the yoke to the bonnet so as to guard against longitudinal displacement of the box in relation to the axle, I provide a key -16' consisting of a vertically disposed plate which is of rectangular form and is disposed removably intwo correspondingly arranged channels 1717 formed at opposite sides of the bonnet on the interior thereof. 'Said plate. is provided with a Wide centrally disposed vertical slot 18 formed with a semi-circular. up er end and extending. through the lower edge thereof so as to conform to the yoke, whereby lli is seated in the like shaped groove formed in the yoke at the front of the collar v 7. The aforesaid opening 3 in the top of the" bonnet allows this plate to be read ly removed and replaced. I prefer to Witnesses:

provide the top' portion of this plate with an aperture 20 which is designed to receive the end of a bar or other device for conveniently removing the same.

By the described arrangement of the parts it will be evident that in event of any tendency of thebearing-sleeve to' shift upon the axle the position of the rollers will-not be affected. Furthermore, by locating the end-thrust for the roller as stated, it is ob- .vious that the liability of the rollers to tilt is eliminated.

At the inner end of the box is provided the usual and well known dust-guard 21- fixed-to the axle so as to encompass a flang formed on the box.

While I have shown the bearing-sleeve 10'" embracing the axle, still at the same time it is obvious that this may be dispensed with, in which instance. the rollers would be afforded a direct bearing upon the axle. What I claim is The combinationwith an axle provided at its end portion with afcircumferential groove to rodu'ce a collar on the extreme end thereo friction bearings and formed with abonnet receiving the'end portion 'of the axle, the said bonnet being formed in the interior with two oppositely disposed vertical channels and provided at its top with an opening extending completely across the same, a

bearing-sleeve embracing the axle within the box, a yoke shaped to. straddle the collar and groovedportion of the axle and abutting against the adjacent end of the bearingan axle-boxprovided with anti-v sleeve, said yoke projecting at the front of the collar and formed with an external groove-coinciding with the aforesaid channels, and 'a' plate inserted removably in said channels and seated in the groove of the yoke for the purpose set forth.

BENJAMIN S QLAWSON.

H. A. LOVELACE, ASA- L. Mnmuox. 

